80814678377 has 2 divisors, whose sum is σ = 80814678378. Its totient is φ = 80814678376.

The previous prime is 80814678361. The next prime is 80814678391. The reversal of 80814678377 is 77387641808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80736107881 + 78570496 = 284141^2 + 8864^2 .

It is a cyclic number.

It is not a de Polignac number, because 80814678377 - 2⁴ = 80814678361 is a prime.

It is not a weakly prime, because it can be changed into another prime (80814678877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40407339188 + 40407339189.

It is an arithmetic number, because the mean of its divisors is an integer number (40407339189).

Almost surely, 2^80814678377 is an apocalyptic number.

It is an amenable number.

80814678377 is a deficient number, since it is larger than the sum of its proper divisors (1).

80814678377 is an equidigital number, since it uses as much as digits as its factorization.

80814678377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 80814678377 in words is "eighty billion, eight hundred fourteen million, six hundred seventy-eight thousand, three hundred seventy-seven".